Talk:Pozidriv

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[edit] Disagreement

The information below is incorrect! The Pozidriv screw does not have four additional points of contact. These markings are purely for identification purposes. Neither should a Phillips screwdriver be used in a Pozidriv screw as damage to both the screw and the screwdriver will result. The main difference between the two is that the opposite contact faces of a Pozidriv screw or screwdriver are parallel whereas, with the Phillips, they form a V-shape.

I had a mix-up with the drivers. For some reason, I thought the Pozidriv was the Torx. Oops. -- Chris53516 13:57, 16 October 2006 (UTC)
The Pozidriv screw recess does indeed have additional points of contact. You can see them clearly on the Pozidriv bits as the small wedges between each of the four wings of the basic Phillips recess design. —Preceding unsigned comment added by 72.72.89.203 (talk) 19:57, 29 December 2007 (UTC)

[edit] Merge with Posidrive

I didn't put up the orignal suggestion but I've created the talk: article. I agree that the two articles should be merged. --Rehnn83 15:12, 21 September 2006 (UTC)

[edit] Spelling

Can we get some consensus on how to spell Posidrive Posidriv Pozidrive Pozidriv? Looks a little odd having the same term spelled several ways in the same paragraph. 81.104.170.167 19:50, 7 October 2006 (UTC)

I agree there neeeds to be some consisteny. I would say always use Pozidriv as the main term, and then mention the others as "also known as Posidrive, Posidriv etc.." --Rehnn83 20:33, 7 October 2006 (UTC)

[edit] Sizes

I can't see any references to the PH000, PH00, PH0, PH1 etc sizes. Any ideas? —The preceding unsigned comment was added by 85.210.30.29 (talk) 15:38, 8 January 2007 (UTC).

PH1 is the smallest Phillips you will normally see in a 'regular' screwdriver. PH0 on down in size are miniature sizes usually found in jeweler's or machinist's screwdriver sets, not in DIY sets.

[edit] Further points

The remark "the cheif disadvantage of Pozidriv screws is that they are far less common than Phillips" is only true in the USA. They are widespread to the point of ubiquity in the UK and the rest of Europe, and I have found them commonly in Africa and South America.



Pozidriv is relatively more common in Canada than the US, but apparently less common than in the UK.

The correct spelling is "POZIDRIV", this was the trade name picked by GKN (Guest, Keen, Nettlefold) in 1963/4. Rights to the profile passed to a number of investment companies, most recently Trifast PLC. (see http://www2.hemscott.com/scripts/AFXnewstory.dll/text?EPIC=TRI&SerialNumber=388&NewsType=CDP&Indate=23/06/2003)

The precision of the recess means that the driver is always on-axis. There is a variant of the driver called SupaDriv which can be used off-axis, although I find they wear badly.

The Philips web site once had a history page explaining that the Phillips recess was intended to cam out, and the Pozi one to remain engaged.

Screwdriver manufacturers have to pay a licence to Trifast, as they do to Phillips for the other profile, hence the rise of generic "crosshead" drivers in cheap sets - that fit nothing and damage everything! -- Brunnian 16:55, 28 April 2007 (UTC)

I was going to make the first point above - I can't remember the last time I saw Phillips head screws on sale. I'm sure they can be found if you want them, but they are so non-standard these days. Wetmikep (talk) 19:01, 3 March 2008 (UTC)

[edit] Supa or Supra Drive?

Which one is it? The text says Supa. the chart at the right says Supra. I believe Supa is correct. —Preceding unsigned comment added by 72.72.89.203 (talk) 19:49, 29 December 2007 (UTC)

[edit] Inclusion of Supa Drive

Is Supa Drive the SAME as Pozidriv, or is it different? This point needs to be clarified with an appropriate reference, as the text implies that they are the same, seemingly just a difference in brand names. It does not appear all that common from a Google search. —Preceding unsigned comment added by 72.72.89.203 (talk) 20:06, 29 December 2007 (UTC)

Pozidriv essentially only works on-axis. Supadriv is a modification of the recess in the screw to permit a small amount of off-axis angle without altering the security of drive. It has only two of the four "tick marks" between the main recesses. United States Patent 4464957 seems to be relevant. There are also SupaDriv drivers. Supadriv® is a registered trademark of European Industrial Services LTD, UK. —Preceding unsigned comment added by Brunnian (talk • contribs) 22:30, 12 January 2008 (UTC)